BLK_TA_SLEEPRQ    944 kernel/trace/blktrace.c 		blk_add_trace_bio(q, bio, BLK_TA_SLEEPRQ, 0);
BLK_TA_SLEEPRQ    951 kernel/trace/blktrace.c 			__blk_add_trace(bt, 0, 0, rw, 0, BLK_TA_SLEEPRQ,